If $a \div b = 2$ and $b \div c = \frac{4}{3}$, what is the value of $c \div a$? Express your answer as a common fraction.
a/b = 2 b/c = 4/3
Note that (a/b) * ( b/c) = ( ab ) / (bc) = a / c = 2 * 4/3 = 8/3
